Drawing Amperian Loops

Prompt

“Draw an Amperian loop that you would use to calculate the magnetic field of a sheet of current. ”

Context

This SWBQ can be done as a part of the lecture that is the introduction to the Ampere's Law Activity. It is a way to prime students for thinking about what symmetry arguments are needed.

Wrap Up

One that is parallel or perpendicular to field at every point and where the magnitude is constant
$\vec{B}=\pm B(z)\, \hat{y}$ from symmetry arguments (see lecture), so want constant $z$, same infinitesimal distance ($dz$) above and below sheet

Powerpoint prompt
PDF prompt

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